New To Tortoise Life. Help!

Me and my partner recently welcomed a beautiful little Hermann tortoise into our family, his name is Tony.
We're feeding him the right diet (we hope!) He has a lovely set up and we've finally seen him drink today during his daily soak in the bath.

I have two questions;
1: How often should they pee/poo? He's only peed once in the last 3 days, on my hand and it was clear. Not whiteish. We haven't seen him poo yet.

2: How do we know if he likes/dislikes something? We want to give him the best care possible, so want to know what's best.

They don't wee/ poo daily, they do need the correct temperature to digest their food though, they also eat their poo at times, awful I know.

I would say for them to be happy it's just about giving the best set up you can with a choice of temperatures, good substrate and plenty of things to climb over, he/ she needs to be left to act like a tortoise, so not walking around the house etc, normally when their unhappy or stressed their quite and hide, they can do this in a new set up they can some times not eat much at first as well, you might find these helpful just to get you started and any questions you have just ask there's always someone around happy to help.